C/2000 CT54 LINEAR
more info
C/2000 CT54 was discovered on 2 February 2000 by LINEAR Survey as apparently asteroidal object. At once, its cometary apperance was reported [IAUC 7368, 2000 February 18]. Later, pre-discovery detections from 28 January 2000 (LINEAR data) and 21 March 1999 (Sloan Digital Sky Survey) were found.
This comet made its closest approach to the Earth on 29 July 2001 (2.606 au), 40 days after perihelion.
Solutions given here are based on data spanning over 4.8 yr in a range of heliocentric distances: 7.72 au – 3.156 au (perihelion) – 8.52 au.
This Oort spike comet suffers rather strong planetary perturbations during its passage through the planetary system that lead to notable more tight future orbit with semimajor axis shorter than 2000 au (see future barycentric orbit).
See also Królikowska 2014 and Królikowska and Dybczyński 2017.

solution description
number of observations 210
data interval 1999 03 21 – 2004 01 17
data type perihelion within the observation arc (FULL)
data arc selection entire data set (STD)
range of heliocentric distances 7.72 au – 3.16 au (perihelion) – 8.52 au
type of model of motion NS - non-gravitational orbits for standard g(r)
data weighting YES
number of residuals 417
RMS [arcseconds] 0.75
orbit quality class 1a+
orbital elements (heliocentric ecliptic J2000)
Epoch 2001 06 20
perihelion date 2001 06 19.50094300 ± 0.00024700
perihelion distance [au] 3.15599443 ± 0.00000824
eccentricity 0.99861902 ± 0.00000833
argument of perihelion [°] 272.649348 ± 0.000048
ascending node [°] 18.964790 ± 0.000019
inclination [°] 49.206633 ± 0.000042
recip semi-major axis [10-6 au-1] 437.57 ± 2.64
Time distribution of positional observations with corresponding heliocentric (red curve) and geocentric (green curve) distance at which they were taken. The horizontal dotted line shows the perihelion distance for a given comet whereas vertical dotted line – the moment of perihelion passage
non-gravitational parameters
A1 [10-8au/day2] 778 ± 53.6
A2 [10-8au/day2] 51.5 ± 25.9
A3 [10-8au/day2] 0 (assumed)
m -2.15
n 5.093
k -4.6142
r0 [au] 2.808
α 0.1113